Oki IP-6620 Maintenance Manual page 249

5.5.14 System Error 164X: USB Chip Register Read/write Error
<Description>
The CPU could not correctly read from or write to the PCB-ASSY-IPB5-100's USB controller.
This error is detected through the process below:
(1) The printer is started;
(2) The printer writes test data on the USB chip's register; and
(3) Though the printer reads the data on the register, the read data is not same as the written
data.
<Faulty part>
PCB-ASSY-IPB5-100
<Action>
Restart the printer.
If the error persists, check the Items to be Checked on the table below, and perform the actions
starting from the top until the problem is solved.
No
1 Firmware
2 PCB-ASSY-IPB5-100
5-90
Chapter 5 Troubleshooting (Engine Section and USB Controller Section)
X USB controller
0 Peripheral
1
Items to be Checked
OKI Data Infotech Corporation CONFIDENTIAL
Host
Upgrade the firmware to the latest version.
Replace the PCB-ASSY-IPB5-100.
Action